SUBSEA TWIN SLAB GATE VALVE

Subsea twin through conduit gate valves are designed according to API6DSS, API6A, API17D with the addition of customer requirements when present. The valves do not rely on lubricant or grease to assist sealing between the gate and seat. Metal-to-metal sealing is used between the gate and seat and between the seat and body. Metal-to-metal sealing is also provided between body-to-bonnet and stem-to-body at fail position via backseat. The Subsea gate valves are actuated by hydraulic actuator and/or gearbox as requested.

Suitable for: Subsea

BASIC CHARACTERISTICS

API6DSS, API6A, API17D design as requested
Bi-directional sealing
Floating spring energized metal-to-metal seats (tungsten carbide coating thickness 0,25 mm on seats and 0,4 mm on gate)
Non-elastomeric seals to avoid the risk of gradual degradation of the seals over their life
Full metal-to-metal sealing at any primary pressure boundary including valve stem at fail position with the option of double backseat to provide metal sealing at both open and close positions.
Downstream sealing with pressurized body cavity to assist fail safe stroke
Forged material to comply with API6A PSL3
Valve actuation with dedicated hydraulic actuator and ROV operable Gearbox

OTHER CHARACTERISTICS

	900-1500 lbs / 3000 psi	5000 psi / 2500 lbs	7500 psi	10000 psi	15000 psi
½”-1”	Standard	Standard	Standard	Standard	Standard
1 13/16”	Standard	Standard	Standard	Standard	Standard
2 1/16”	Standard	Standard	Standard	Standard	Standard
3 1/8”	Standard	Standard	Standard	Standard	Standard
4 1/16”	Standard	Standard	Standard	Standard	Standard
5 1/8”	Standard	Standard	Standard	Standard
7 1/16”	Standard	Standard	Standard	Standard
9”	Standard	Standard	Standard	Standard
11”	Standard	Standard	Standard
13 5/8”	Standard	Standard

Features		Features
Primary Metal Seat	Standard	FSC, DA, FSO valve design	Standard
Self relieving Seats	Standard	Seal Areas Overlay	Standard
Primary Metal Seals (BX)	Standard	Wetted Areas Overlay	On Request
Primary Metal Stem Seal at fail position	Standard	Double metal stem backseat	On Request
Diver, ROV or Actuated	As Requested	Electrical Continuity	Standard
Hybrid valve (Metal SR/Soft DPE)	On Request	API6A/API17D qualification	As Requested

BODY, BONNET, PUPS	ASTM A350-LF2 + Inconel 625 overlay ASTM A694-F52/F56/F60/F65 + Inconel 625 overlay ASTM A182-F22 + Inconel 625 overlay Duplex 22% Cr Superduplex 25% Cr Inconel 625
TRIM (SEAT, BALL AND STEM)	ASTM A350-LF2 + Inconel 625 overlay ASTM A694-F52/F56/F60/F65 + Inconel 625 overlay Duplex 22% Cr Superduplex 25% Cr Inconel 625 Inconel 718
BODY SEALS / SEAT SEALS	METAL GASKET (BX type gasket) LIPSEAL– PTFE + ELGILOY V – PACK – PTFE + PEEK + ELGILOY OR – HNBR AED (for seawater sealing)
SEAT INSERT	METAL WITH TUNGSTEN CARBIDE COATING PEEK / PCTFE / PTFE (back insert)
BOLTING	ASTM A320-L7 / A193-B7 (XYLAN COATED, NICKEL/ZINC PLATED) ASTM A320-L7M / A193-B7M (XYLAN COATED, NICKEL/ZINC PLATED) ASTM A453-GR.660 (XYLAN COATED) UNS S32760 (25% Cr)

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